<template>
  <el-container class="home-container">
      <!-- 头部 -->
  <el-header> 
      <div>
          <img src="../assets/star.png" alt=""/>
          <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 主体 -->
  <el-container>
      <!-- 侧边栏 -->
    <el-aside :width="isClllapse ? '64px':'200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu :default-active="activePath" router :collapse-transition="false" :collapse="isClllapse" unique-opened background-color="#333744" text-color="#fff" active-text-color="#409EFF">
      <!-- 一级菜单 -->
      <el-submenu  :index="item.id +'' " v-for="item in menulist" :key="item.id">
        <!-- 一级菜单模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-location"></i>
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item @click="saveNavState('/'+subItem.path )" :index="'/'+subItem.path " v-for="subItem in item.children" :key="subItem.id">
          <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <span>{{subItem.authName}}</span>
          </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧区域 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>

</template>

<script>
export default {
  data(){
    return{
      //左侧列表数据
      menulist: [],
      isClllapse:false,
      activePath:''
    }
  },
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods:{
      logout(){
          window.sessionStorage.clear();
          this.$router.push('/login');
      },
      //获取左侧列表数据
      async getMenuList(){
        const { data: res } = await this.$http.get('menus')
        if(res.meta.status != 200) return this.$message.error(res.meta.msg)
        this.menulist = res.data

      },
      //点击按钮折叠与展开
      toggleCollapse(){
        this.isClllapse =! this.isClllapse
      },
      saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath)
        this.activePath = activePath
      }
  }
   
}
</script>

<style lang="less" scoped>
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color:#fff;
    font-size: 20px;
    >div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
        img{
            height: 42px;
            width: 42px;
        }
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
}
.el-main{
    background-color: #EAEDF1;
}
.home-container{
    height: 100%;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
